Rebound check



.Munn l0 t w, 4 m. 6 oel. e e .n ,S 2 R ,0 EWR 2 m. w SCRL. AD H wc .Oe d HBD. .mm R l .l F x A 7 2 9 1 5 2 I t oct. 25,1927. Y M4658@ R. H. H ASSLER REBOUND CHECK 'Filed Deo. 18, 1925 2 sheets-sheet 2 Patented Oct. 25, 1927.

ROBERT H. HASSLER, OF INDIANAPOLIS,

enterar ermee.

INDIANA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO HASSLER MANUFACTURING CO., INC., OF INDIANAPOLIS, INDIANA, A

CORPORATION OF DELAWARE.

REBOUND CHECK.

Application filed December 18,1925.

The present invention relates to impro-ve.- ments in rebound checks or `stabilizers of the type in which a spring is utilized for increasingthe resistance of relatively movable friction elements and a spring is also utilized for returning the moved element to normal position. My specific improvement is in the provision of a common spring adapter or seat for one end of each vof the springs.` In the embodiment to be described, one of the springs is a compression spring and theother a torsion spring, land due to the adjustability of the adapter, the force of both springs may be regulatedV in a simple manner. Hereby the stabilizer may meet various operating conditions.

In the accompanying drawings- Fig. 1 shows a stabilizer ofthe type contemplated in position at one end of a vehicle chassis,

Fig. 2 is a vertical section of Fig. 1, the vehicle spring being omitted,

Fig. 3 is a view of the stabilizer with the cover removed. v

Fig. 4: is a section in part of Fig. 3,

Fig. 5 shows the anchoring means for the outer end of the' spiral torsion spring, and

Fig. 6 is a viewof the adapter cap.

In Figs. '1 and 2, 10 indicatesk a side' element of the chassis frame and 11 a main spring pivoted thereto. In the combination as shown, the vstabilizerproper is attached to the frame and adaptedto be oscillated by the actuating strap 12 'fastened at one end to the vehicle axle and at its other to the Aouter periphery of the drum 13 of the Stabilizer. `As may be seen vfrom Fig. 1, th'e drum 13 hasa projecting plate 14 while the i4 annuli 13 and 13 backed up and riveted together as at 18. These rivets also secure a ydished annulus 19 which has the conical faces 19 and 19, inverted with respectto each other. A circular back plate 2Q 5ta Serial*4 No. 76,295.

into the rear of the drum section 13 and has a spacing boss 20 through which passes a screw 21. The screw 21 passes through an aperture in frame `element 10 and is secured by a nut 21. A projection 22 of the back plate passes under frame element 10 in contact therewith to prevent rot-ation of the back under strain.

On its front face the back plate has rigidly secured thereto, coaXially, an annulus 23, Fig. 2, of impregnated wood having conical faces mating with the faces 19 and 19 of annulus 19. This annulus 23, .which may be termed the main friction element, has a series of blind holes 23 in its rear face into which project studs 24 fixed in thevback plate 20. Rotation of element 23 is thus prevented.

`A further annulus, 25, of impregnated wood, which may be termed thrust member, bears against a face 26 of the annulus 19. The back plate 2() has a central boss 27 eX- tending centrally through the described en- Y semble. This boss 27 has four axially-exn tending grooves 27 (Figs. 2 and 4) into which take the lugs 28 of a thrust plate 28 whereby rotation of the latter is prevented. A compression spring 29 loosely surrounds boss 27 and is compressed between thrust plate 28 and the adapter cap 30. This latter is held in place by a cap screw 31 eX- tending through a central hole therein and engaging in a threaded axial lbore of the boss and by studs 30 engaging in grooves 27d for prevent-ing its rotation, Figs. 2, 3 an 6.

From the description thus far, it will be seen that, upon relative rotation of the drum 13 and back plate 20, a resistance will occur due to friction between thrust member 25 and thrust plate 28 or face 26, or both (member 25 being a floating member), and between faces 19, 19 and member 23.

The drum having been thus rotated, as on the vehicle rebound, means are necessary to return the-drum to normal position, thatfis, to rewind the strap. For this purpose I provide a spiral torsion spring 32 having sufficient force to return the drum against the constant resist-ance of the friction elements. One bentend of this spring is retained in anaxially extending s161530 of the spring' adapter 30, see llig; d, while the other bentl end is retained by a plate 33 riveted as at 33 to the vertical flange of the drum.

It Will be noted from Figs. 2 and 6 that the adapter cap is of cylindrical shape, the lugs being rivet-ed in the head and spaced to engage the symmetrically disposed grooves 27', Fig. 4t. The cap can thus assume, in the present instance, four differentangular positions relative to the boss Q7. The slot 30 may thus be selectively positioned to assume the correct relation to the inner end of the torsion spring. This is of importance in securing the proper amount of Wrap of the strap l2 on drinn 13 and the proper force of spring 32. The extent to which screiv 3l is tight-cned determines the strength of spring Q9. In most cases, however, this screw Will be entirely seated, as shown. y

The configuration of plate 83 may be most clearly seen from Figs. 3 and 5. The plate has a base flange riveted, as stated above, to the drum. The upright portion of the plate is tconcentric with the drum, Fig. 3. and is spaced from the wall of elenient 13 by a little more than the thickness of the spring. The outer end of spring is held between the plate and the drinn ivall while its extremity is engaged under projection 3G or 36, according to the direction in which its force is to be exerted. This retaining means serves to hold the spring in proper position under fiexure, that is, prevents any tendency to travel to one side or another of the diuin.

rIhe stabilizer as described is designed to Work in a constant bath of grease and upon assembling drinn 13 is conipletely filled.

The friction faces are reached by means of a system of ducts, con'miunicating with grease connection 37. This feature need not be described here as it has been set forth and claimed in a separate application. A felt Washer 38 prevents the extrusion of grease from the drinn and the entrance of foreign matter from without.

Having thus described my invention, I claim:

'1. In a rebound check, an annular conical friction element, a drinn comprising oppositely disposed cylindrical flanged discs. a hub supporting member, a conical friction cup mounted on said drinn and engaged with the friction element, spring means for forcing the friction cup against said friction element, a member for oscillating said flanged discs, and means for securing one end of saidrmember to the flanged discs of said drinn externally thereof.

2. I n a rebound check, a hub supporting member, a friction element mounted on said member, an oscillating drinn having a friction surface thereon to frictionally engage said friction element, a horizontally disposed hub carried by said hub supporting member,

a spirally Wound spring mounted on said hub, and a frictional thrust bearing interposed between said spring and the friction surface of said drum.

3. In a rebound check, an annular conical friction element, an oscillating drum, a hub supporting member, a conical friction cup .non-rotatably mounted on said drum and engaged with the friction element, a conical thrust bearing for transmitting pressure to the friction cup, spring means for forcing the conical thrust bearing against the friction cup, and a pressure plate interposed between the spring and the thrust bearing.

4. In a rebound check. an annular conical friction element, an oscillating drum, a conical friction cup, said cup secured to and arranged to oscillate with said drum, said friction cup having conical friction surfaces of varied diameters, a pressure exertingspring for forcing the cup into engagement with the friction element, and a conical bearing interposed between said spring and the smaller of the surfaces on said friction cup.

5'. In a rebound check, a hub supporting member, an annular conical friction element mounted on said hub supporting member, an oscillating drinn, a conical friction cup mounted on said drinnv and arranged to frictionally engage said Vfriction element, a horizontally disposed hub carried by said hub supporting member, a spirally Wound spring mounted on said hub, and a conical thrust bearing interposed between said spring and said friction cup.

6. In a rebound check, a hub supporting member, an annular conical friction element nourotatably mounted on said hub supporting member, an oscillating drinn, a conical friction cup mounted on said drum and arranged to frictionally engage said friction element, a horizontally disposed hub carried by said hub supporting member, a spirally wound spring noni'otatably mounted on said hub, and a conical thrust bearing interposed between said spring and said friction cup.

7. In a rebound check, an annular conical friction'element, an oscillating drum, a hub supporting men'iber, a conical friction cup mounted on said drinn andengaged with the friction element, spring means for forcing the friction cup against said friction element, and means for oscillating said drum, said oscillating drum comprising a pair of oppositely disposed cylindrical flanged discs.

8. In a rebound check, an annular conical friction element, a drum comprising oppositely disposed cylindrical flanged discs, a hub supporting member, a conical friction cup mounted on said drinn and engaged With the friction element, spring means for forcing the friction cup against said friction element, a flexible member for oscillating said flanged discs, and oppositely disposed yao a movement of one of said Aelements relative to the other, a torsion spring for returning the actuated element to normal position, a boss fixed to one of said element-s and extending through an aperture in the other, means for rigidly securing one end of said spring With said apertured element, a member xable on said boss in various angular positions relative thereto, and means for engaging the other end of said spring with said member.

, 10. In a stabilizer', cooperating rotary friction elements, means for positively inducing a movement of one of said elements relative to the other, ya torsion spring for returning the actuated member yto normal position, a boss fixed to one of said elements and extending Athrough anaperture in the other, a plurality of axially-extending grooves on the periphery of said boss, a member surrounding said boss and having a lug adapted to engage' said .grooves selectively, means for rigidly securing one end of said spring with said apertured element, and means for engaging the other Vend of said spring with said lagged member.

11. In a stabilizer, cooperating rotary friction elements, means for positively inducing a. movement of one of said elements relative to the other, a spiral spring for returning the actuated element, a boss xed to one of said elements and extending through an aperture in the other, said boss having equally spaced axially-extending peripheral grooves, a member surrounding said boss and having lugs adapted to selectively engage a plurality of said grooves whereby said member is adapted to assume different angular posit-ions relative to said boss, means for rigidly securing said spring with said apertured element, and means for engaging said spring with said lugged member.

12. In a stabilizer, cooperating rotary friction elements, means for positively inducing a movement of one of said elements relative to the other, a torsion spring for returning the actuated element to normal position, a boss fixed to one of said elements and extending through an aperture in the other, a compression spring bearing with one end on said apertured member, means for engaging one end of said torsion spring with said apertured member, and means fixable on said boss and forming a common seat for the other end of each of said springs.

13. In a. stabilizer, cooperating rotary friction elements, means for positively inducing a movement of one of said elements relative to the other, a torsion spring for returning the actuated element to normal position, a

boss fixed to one of said elements and extending through an aperture in the other, a compression spring bearing With one end on said apertured member, means for engaging one end of said torsion spring with said apertured member, means fixable on said boss and forming a commonseat for each-of said springs, and meansfor altering the fixed position of said xable means for adjusting the-force of said compression spring.

14. In a stabilizer, cooperating rotary friction elements, means for positively inducing a movement of one of said elements relative to the other, a torsion spring for returning the actuated element to normal position, a boss fixed to one of said elements and extending through an aperture in the other, a compression spring bearing With one end on said apertured member, means for engaging one end of said torsion spring with said apertured member, means fixable on said boss and forming a common seat for each of said springs, and means for altering the fixed position of said lixable means for adjusting the force of said torsion spring.

15. In a stabilizer, cooperating rotary friction elements, means for positively inducing a movement of one of said elements relative to the other, a torsion spring for returning` the actuated element to normal position, a boss fixed to one of said elements and extending through an aperture in the other, a compression spring bearing With one end on said apertured member, means for engaging one end of said torsion springv with said apertured member, means lixable on said boss and fori'ning a common seat for each of said springs, and means for altering the fixed position of said lixable means for adjusting the force of both of said springs.

16. In a rebound check, a supporting plate having a hub extending therefrom, a friction element supported by and secured to said hub having a conical friction surface, an oscillating drum mounted With respect to said supporting plate so as to extend about the periphery thereof, whereby said plate and drum will provide a housing for said check, a retaining strap secured to the outer periphery of said drum adapted to be Wound thereabout, a second friction element secured to said drum and having a conical friction face in frictional engagement with said firstmentioned conical face and freely rotatable with respect to-said hub, and a spiral spring having one end secured to the free end of said hub and the other end to said drum for returning the elements to normal position after being actuated.

17. In a rebound check, a supporting plate having a hub extending therefrom, a friction element supported by and secured to said hub havingr a conical friction surface,`

an oscillating drum mounted With respect to said supporting plate so as to exten-d about lll) the periphery thereof, whereby said plate and drum will provide a housing for said check, a retaining strap secured to theouter periphery of said drum adapted to be wound thereabout, a second friction element secured to said drum and having a conical friction face in frictional engagement with said firstmentioned conical face and freely rotatable with respect to said hub, a spiral spring for returning the actuated elements to normal position,I one end of said spring being' secured to the free end of said hub, and means for gripping a substantial length of said spring at the other end thereof and securing it to said drum.

18. In a rebound check, a supporting plate having' a hub extending therefrom, a friction element supported by and secured to said hub having a conical friction surface, an oscillating' drum mounted With respect to said supporting plate so as to extend about the periphery thereof, whereby said plate and drum Will provide a housing for said check, ya retaining strap secured to the outer periphery of said drinn adapted to be wound thereabout, a second friction clement secured to vsaid drum and having a conical friction face in frictional engagement with said first-mentioned conical face and freely rotatable with respect to said hub, a spiral spring for returning the actuated elements to normal position, one end of said spring being secured to the free end of said hub, and means for connecting the outer end of said spring to the inner periphery of said drum, including a channel plate secured thereto for gripping' a substantial length of said spring.

19. In a rebound check, a rigid supporting member adapted to be secured to a vehicle having an inwardly extendin(r hub centrally positioned With respect thereto, an oscillating drum-shaped member adapted to telescope over the peripheral edge of said supporting' member, means for detachably securing' a flexible strap to the external peripheral surface of said oscillating member, a friction disc comprising an impregnated Wood block having a central conical recess formed therein, a conical metal disk adapted to seat in said recess and having its external conical surface in frictional engagement With the internal conical surface formed by said re cess, and a spiral spring having its inner end secured to the free end of said hub and its outer end to the inner surface of said drumlike member for returning said members to normal relative position after being actuated.

ROBERT H. HASSLER. 

